/*----------------------------------------------------------------------------/ / Petit FatFs - FAT file system module R0.03a /-----------------------------------------------------------------------------/ / / Copyright (C) 2019, ChaN, all right reserved. / / Petit FatFs module is an open source software. Redistribution and use of / Petit FatFs in source and binary forms, with or without modification, are / permitted provided that the following condition is met: / / 1. Redistributions of source code must retain the above copyright notice, / this condition and the following disclaimer. / / This software is provided by the copyright holder and contributors "AS IS" / and any warranties related to this software are DISCLAIMED. / The copyright owner or contributors be NOT LIABLE for any damages caused / by use of this software. /-----------------------------------------------------------------------------/ / Jun 15,'09 R0.01a First release. / / Dec 14,'09 R0.02 Added multiple code page support. / Added write funciton. / Changed stream read mode interface. / Dec 07,'10 R0.02a Added some configuration options. / Fixed fails to open objects with DBCS character. / Jun 10,'14 R0.03 Separated out configuration options to pffconf.h. / Added _USE_LCC option. / Added _FS_FAT16 option. / / Jan 30,'19 R0.03a Supported stdint.h for C99 and later. / Removed _WORD_ACCESS option. / Changed prefix of configuration options, _ to PF_. / Added some code pages. / Removed some code pages actually not valid. /----------------------------------------------------------------------------*/ #include "pff.h" /* Petit FatFs configurations and declarations */ #include "diskio.h" /* Declarations of low level disk I/O functions */ /*-------------------------------------------------------------------------- Module Private Definitions ---------------------------------------------------------------------------*/ #if PF_DEFINED != 8088 /* Revision ID */ #error Wrong include file (pff.h). #endif #if PF_FS_FAT32 #if !PF_FS_FAT16 && !PF_FS_FAT12 #define _FS_32ONLY 1 #else #define _FS_32ONLY 0 #endif #else #if !PF_FS_FAT16 && !PF_FS_FAT12 #error Wrong PF_FS_FATxx setting. #endif #define _FS_32ONLY 0 #endif #define ABORT(err) {fs->flag = 0; return err;} /*--------------------------------------------------------*/ /* DBCS code ranges and SBCS extend char conversion table */ /*--------------------------------------------------------*/ #if PF_USE_LCC == 0 /* ASCII upper case character only */ #elif PF_CODE_PAGE == 932 /* Japanese Shift-JIS */ #define _DF1S 0x81 /* DBC 1st byte range 1 start */ #define _DF1E 0x9F /* DBC 1st byte range 1 end */ #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ #define _DF2E 0xFC /* DBC 1st byte range 2 end */ #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ #elif PF_CODE_PAGE == 936 /* Simplified Chinese GBK */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x40 #define _DS1E 0x7E #define _DS2S 0x80 #define _DS2E 0xFE #elif PF_CODE_PAGE == 949 /* Korean */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x41 #define _DS1E 0x5A #define _DS2S 0x61 #define _DS2E 0x7A #define _DS3S 0x81 #define _DS3E 0xFE #elif PF_CODE_PAGE == 950 /* Traditional Chinese Big5 */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x40 #define _DS1E 0x7E #define _DS2S 0xA1 #define _DS2E 0xFE #elif PF_CODE_PAGE == 437 /* U.S. */ #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 720 /* Arabic */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 737 /* Greek */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 771 /* KBL */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} #elif PF_CODE_PAGE == 775 /* Baltic */ #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \ 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 850 /* Latin 1 */ #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 852 /* Latin 2 */ #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \ 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \ 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} #elif PF_CODE_PAGE == 855 /* Cyrillic */ #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \ 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \ 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 857 /* Turkish */ #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \ 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ #elif PF_CODE_PAGE == 860 /* Portuguese */ #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 861 /* Icelandic */ #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 862 /* Hebrew */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 863 /* Canadian French */ #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 864 /* Arabic */ #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 865 /* Nordic */ #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 866 /* Russian */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif PF_CODE_PAGE == 869 /* Greek 2 */ #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \ 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} #else #error Unknown code page. #endif /* Character code support macros */ #define IsUpper(c) (((c)>='A')&&((c)<='Z')) #define IsLower(c) (((c)>='a')&&((c)<='z')) #if PF_USE_LCC && !defined(_EXCVT) /* DBCS configuration */ #ifdef _DF2S /* Two 1st byte areas */ #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) #else /* One 1st byte area */ #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) #endif #ifdef _DS3S /* Three 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) #else /* Two 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) #endif #else /* SBCS configuration */ #define IsDBCS1(c) 0 #define IsDBCS2(c) 0 #endif /* _EXCVT */ /* FatFs refers the members in the FAT structures with byte offset instead / of structure member because there are incompatibility of the packing option / between various compilers. */ #define BS_jmpBoot 0 #define BS_OEMName 3 #define BPB_BytsPerSec 11 #define BPB_SecPerClus 13 #define BPB_RsvdSecCnt 14 #define BPB_NumFATs 16 #define BPB_RootEntCnt 17 #define BPB_TotSec16 19 #define BPB_Media 21 #define BPB_FATSz16 22 #define BPB_SecPerTrk 24 #define BPB_NumHeads 26 #define BPB_HiddSec 28 #define BPB_TotSec32 32 #define BS_55AA 510 #define BS_DrvNum 36 #define BS_BootSig 38 #define BS_VolID 39 #define BS_VolLab 43 #define BS_FilSysType 54 #define BPB_FATSz32 36 #define BPB_ExtFlags 40 #define BPB_FSVer 42 #define BPB_RootClus 44 #define BPB_FSInfo 48 #define BPB_BkBootSec 50 #define BS_DrvNum32 64 #define BS_BootSig32 66 #define BS_VolID32 67 #define BS_VolLab32 71 #define BS_FilSysType32 82 #define MBR_Table 446 #define DIR_Name 0 #define DIR_Attr 11 #define DIR_NTres 12 #define DIR_CrtTime 14 #define DIR_CrtDate 16 #define DIR_FstClusHI 20 #define DIR_WrtTime 22 #define DIR_WrtDate 24 #define DIR_FstClusLO 26 #define DIR_FileSize 28 /*-------------------------------------------------------------------------- Private Functions ---------------------------------------------------------------------------*/ static FATFS *FatFs; /* Pointer to the file system object (logical drive) */ /*-----------------------------------------------------------------------*/ /* Load multi-byte word in the FAT structure */ /*-----------------------------------------------------------------------*/ static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */ { WORD rv; rv = ptr[1]; rv = rv << 8 | ptr[0]; return rv; } static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */ { DWORD rv; rv = ptr[3]; rv = rv << 8 | ptr[2]; rv = rv << 8 | ptr[1]; rv = rv << 8 | ptr[0]; return rv; } /*-----------------------------------------------------------------------*/ /* String functions */ /*-----------------------------------------------------------------------*/ /* Fill memory block */ static void mem_set (void* dst, int val, int cnt) { char *d = (char*)dst; while (cnt--) *d++ = (char)val; } /* Compare memory block */ static int mem_cmp (const void* dst, const void* src, int cnt) { const char *d = (const char *)dst, *s = (const char *)src; int r = 0; while (cnt-- && (r = *d++ - *s++) == 0) ; return r; } /*-----------------------------------------------------------------------*/ /* FAT access - Read value of a FAT entry */ /*-----------------------------------------------------------------------*/ static CLUST get_fat ( /* 1:IO error, Else:Cluster status */ CLUST clst /* Cluster# to get the link information */ ) { BYTE buf[4]; FATFS *fs = FatFs; #if PF_FS_FAT12 UINT wc, bc, ofs; #endif if (clst < 2 || clst >= fs->n_fatent) return 1; /* Range check */ switch (fs->fs_type) { #if PF_FS_FAT12 case FS_FAT12 : { bc = (UINT)clst; bc += bc / 2; ofs = bc % 512; bc /= 512; if (ofs != 511) { if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break; } else { if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break; if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break; } wc = ld_word(buf); return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); } #endif #if PF_FS_FAT16 case FS_FAT16 : if (disk_readp(buf, fs->fatbase + clst / 256, ((UINT)clst % 256) * 2, 2)) break; return ld_word(buf); #endif #if PF_FS_FAT32 case FS_FAT32 : if (disk_readp(buf, fs->fatbase + clst / 128, ((UINT)clst % 128) * 4, 4)) break; return ld_dword(buf) & 0x0FFFFFFF; #endif } return 1; /* An error occured at the disk I/O layer */ } /*-----------------------------------------------------------------------*/ /* Get sector# from cluster# / Get cluster field from directory entry */ /*-----------------------------------------------------------------------*/ static DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ CLUST clst /* Cluster# to be converted */ ) { FATFS *fs = FatFs; clst -= 2; if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ return (DWORD)clst * fs->csize + fs->database; } static CLUST get_clust ( BYTE* dir /* Pointer to directory entry */ ) { FATFS *fs = FatFs; CLUST clst = 0; if (_FS_32ONLY || (PF_FS_FAT32 && fs->fs_type == FS_FAT32)) { clst = ld_word(dir+DIR_FstClusHI); clst <<= 16; } clst |= ld_word(dir+DIR_FstClusLO); return clst; } /*-----------------------------------------------------------------------*/ /* Directory handling - Rewind directory index */ /*-----------------------------------------------------------------------*/ static FRESULT dir_rewind ( DIR *dj /* Pointer to directory object */ ) { CLUST clst; FATFS *fs = FatFs; dj->index = 0; clst = dj->sclust; if (clst == 1 || clst >= fs->n_fatent) { /* Check start cluster range */ return FR_DISK_ERR; } if (PF_FS_FAT32 && !clst && (_FS_32ONLY || fs->fs_type == FS_FAT32)) { /* Replace cluster# 0 with root cluster# if in FAT32 */ clst = (CLUST)fs->dirbase; } dj->clust = clst; /* Current cluster */ dj->sect = (_FS_32ONLY || clst) ? clust2sect(clst) : fs->dirbase; /* Current sector */ return FR_OK; /* Seek succeeded */ } /*-----------------------------------------------------------------------*/ /* Directory handling - Move directory index next */ /*-----------------------------------------------------------------------*/ static FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table */ DIR *dj /* Pointer to directory object */ ) { CLUST clst; WORD i; FATFS *fs = FatFs; i = dj->index + 1; if (!i || !dj->sect) return FR_NO_FILE; /* Report EOT when index has reached 65535 */ if (!(i % 16)) { /* Sector changed? */ dj->sect++; /* Next sector */ if (dj->clust == 0) { /* Static table */ if (i >= fs->n_rootdir) return FR_NO_FILE; /* Report EOT when end of table */ } else { /* Dynamic table */ if (((i / 16) & (fs->csize - 1)) == 0) { /* Cluster changed? */ clst = get_fat(dj->clust); /* Get next cluster */ if (clst <= 1) return FR_DISK_ERR; if (clst >= fs->n_fatent) return FR_NO_FILE; /* Report EOT when it reached end of dynamic table */ dj->clust = clst; /* Initialize data for new cluster */ dj->sect = clust2sect(clst); } } } dj->index = i; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Directory handling - Find an object in the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_find ( DIR *dj, /* Pointer to the directory object linked to the file name */ BYTE *dir /* 32-byte working buffer */ ) { FRESULT res; BYTE c; res = dir_rewind(dj); /* Rewind directory object */ if (res != FR_OK) return res; do { res = disk_readp(dir, dj->sect, (dj->index % 16) * 32, 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; /* First character */ if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) break; /* Is it a valid entry? */ res = dir_next(dj); /* Next entry */ } while (res == FR_OK); return res; } /*-----------------------------------------------------------------------*/ /* Read an object from the directory */ /*-----------------------------------------------------------------------*/ #if PF_USE_DIR static FRESULT dir_read ( DIR *dj, /* Pointer to the directory object to store read object name */ BYTE *dir /* 32-byte working buffer */ ) { FRESULT res; BYTE a, c; res = FR_NO_FILE; while (dj->sect) { res = disk_readp(dir, dj->sect, (dj->index % 16) * 32, 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ a = dir[DIR_Attr] & AM_MASK; if (c != 0xE5 && c != '.' && !(a & AM_VOL)) break; /* Is it a valid entry? */ res = dir_next(dj); /* Next entry */ if (res != FR_OK) break; } if (res != FR_OK) dj->sect = 0; return res; } #endif /*-----------------------------------------------------------------------*/ /* Pick a segment and create the object name in directory form */ /*-----------------------------------------------------------------------*/ static FRESULT create_name ( DIR *dj, /* Pointer to the directory object */ const char **path /* Pointer to pointer to the segment in the path string */ ) { BYTE c, d, ni, si, i, *sfn; const char *p; #if PF_USE_LCC && defined(_EXCVT) static const BYTE cvt[] = _EXCVT; #endif /* Create file name in directory form */ sfn = dj->fn; mem_set(sfn, ' ', 11); si = i = 0; ni = 8; p = *path; for (;;) { c = p[si++]; if (c <= ' ' || c == '/') break; /* Break on end of segment */ if (c == '.' || i >= ni) { if (ni != 8 || c != '.') break; i = 8; ni = 11; continue; } #if PF_USE_LCC && defined(_EXCVT) if (c >= 0x80) c = cvt[c - 0x80]; /* To upper extended char (SBCS) */ #endif if (IsDBCS1(c) && i < ni - 1) { /* DBC 1st byte? */ d = p[si++]; /* Get 2nd byte */ sfn[i++] = c; sfn[i++] = d; } else { /* Single byte code */ if (PF_USE_LCC && IsLower(c)) c -= 0x20; /* toupper */ sfn[i++] = c; } } *path = &p[si]; /* Rerurn pointer to the next segment */ sfn[11] = (c <= ' ') ? 1 : 0; /* Set last segment flag if end of path */ return FR_OK; } /*-----------------------------------------------------------------------*/ /* Get file information from directory entry */ /*-----------------------------------------------------------------------*/ #if PF_USE_DIR static void get_fileinfo ( /* No return code */ DIR *dj, /* Pointer to the directory object */ BYTE *dir, /* 32-byte working buffer */ FILINFO *fno /* Pointer to store the file information */ ) { BYTE i, c; char *p; p = fno->fname; if (dj->sect) { for (i = 0; i < 8; i++) { /* Copy file name body */ c = dir[i]; if (c == ' ') break; if (c == 0x05) c = 0xE5; *p++ = c; } if (dir[8] != ' ') { /* Copy file name extension */ *p++ = '.'; for (i = 8; i < 11; i++) { c = dir[i]; if (c == ' ') break; *p++ = c; } } fno->fattrib = dir[DIR_Attr]; /* Attribute */ fno->fsize = ld_dword(dir+DIR_FileSize); /* Size */ fno->fdate = ld_word(dir+DIR_WrtDate); /* Date */ fno->ftime = ld_word(dir+DIR_WrtTime); /* Time */ } *p = 0; } #endif /* PF_USE_DIR */ /*-----------------------------------------------------------------------*/ /* Follow a file path */ /*-----------------------------------------------------------------------*/ static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ DIR *dj, /* Directory object to return last directory and found object */ BYTE *dir, /* 32-byte working buffer */ const char *path /* Full-path string to find a file or directory */ ) { FRESULT res; while (*path == ' ') path++; /* Strip leading spaces */ if (*path == '/') path++; /* Strip heading separator if exist */ dj->sclust = 0; /* Set start directory (always root dir) */ if ((BYTE)*path < ' ') { /* Null path means the root directory */ res = dir_rewind(dj); dir[0] = 0; } else { /* Follow path */ for (;;) { res = create_name(dj, &path); /* Get a segment */ if (res != FR_OK) break; res = dir_find(dj, dir); /* Find it */ if (res != FR_OK) break; /* Could not find the object */ if (dj->fn[11]) break; /* Last segment match. Function completed. */ if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow path because it is a file */ res = FR_NO_FILE; break; } dj->sclust = get_clust(dir); /* Follow next */ } } return res; } /*-----------------------------------------------------------------------*/ /* Check a sector if it is an FAT boot record */ /*-----------------------------------------------------------------------*/ static BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */ BYTE *buf, /* Working buffer */ DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ ) { if (disk_readp(buf, sect, 510, 2)) { /* Read the boot record */ return 3; } if (ld_word(buf) != 0xAA55) { /* Check record signature */ return 2; } if (!_FS_32ONLY && !disk_readp(buf, sect, BS_FilSysType, 2) && ld_word(buf) == 0x4146) { /* Check FAT12/16 */ return 0; } if (PF_FS_FAT32 && !disk_readp(buf, sect, BS_FilSysType32, 2) && ld_word(buf) == 0x4146) { /* Check FAT32 */ return 0; } return 1; } /*-------------------------------------------------------------------------- Public Functions --------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Mount/Unmount a Locical Drive */ /*-----------------------------------------------------------------------*/ FRESULT pf_mount ( FATFS *fs /* Pointer to new file system object */ ) { BYTE fmt, buf[36]; DWORD bsect, fsize, tsect, mclst; FatFs = 0; if (disk_initialize() & STA_NOINIT) { /* Check if the drive is ready or not */ return FR_NOT_READY; } /* Search FAT partition on the drive */ bsect = 0; fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */ if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */ /* Check a partition listed in top of the partition table */ if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */ fmt = 3; } else { if (buf[4]) { /* Is the partition existing? */ bsect = ld_dword(&buf[8]); /* Partition offset in LBA */ fmt = check_fs(buf, bsect); /* Check the partition */ } } } if (fmt == 3) return FR_DISK_ERR; if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */ /* Initialize the file system object */ if (disk_readp(buf, bsect, 13, sizeof (buf))) return FR_DISK_ERR; fsize = ld_word(buf+BPB_FATSz16-13); /* Number of sectors per FAT */ if (!fsize) fsize = ld_dword(buf+BPB_FATSz32-13); fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */ fs->fatbase = bsect + ld_word(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */ fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */ fs->n_rootdir = ld_word(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */ tsect = ld_word(buf+BPB_TotSec16-13); /* Number of sectors on the file system */ if (!tsect) tsect = ld_dword(buf+BPB_TotSec32-13); mclst = (tsect /* Last cluster# + 1 */ - ld_word(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16 ) / fs->csize + 2; fs->n_fatent = (CLUST)mclst; fmt = 0; /* Determine the FAT sub type */ if (PF_FS_FAT12 && mclst < 0xFF7) fmt = FS_FAT12; if (PF_FS_FAT16 && mclst >= 0xFF8 && mclst < 0xFFF7) fmt = FS_FAT16; if (PF_FS_FAT32 && mclst >= 0xFFF7) fmt = FS_FAT32; if (!fmt) return FR_NO_FILESYSTEM; fs->fs_type = fmt; if (_FS_32ONLY || (PF_FS_FAT32 && fmt == FS_FAT32)) { fs->dirbase = ld_dword(buf+(BPB_RootClus-13)); /* Root directory start cluster */ } else { fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */ } fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */ fs->flag = 0; FatFs = fs; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Open or Create a File */ /*-----------------------------------------------------------------------*/ FRESULT pf_open ( const char *path /* Pointer to the file name */ ) { FRESULT res; DIR dj; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ fs->flag = 0; dj.fn = sp; res = follow_path(&dj, dir, path); /* Follow the file path */ if (res != FR_OK) return res; /* Follow failed */ if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) return FR_NO_FILE; /* It is a directory */ fs->org_clust = get_clust(dir); /* File start cluster */ fs->fsize = ld_dword(dir+DIR_FileSize); /* File size */ fs->fptr = 0; /* File pointer */ fs->flag = FA_OPENED; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Read File */ /*-----------------------------------------------------------------------*/ #if PF_USE_READ FRESULT pf_read ( void* buff, /* Pointer to the read buffer (NULL:Forward data to the stream)*/ UINT btr, /* Number of bytes to read */ UINT* br /* Pointer to number of bytes read */ ) { DRESULT dr; CLUST clst; DWORD sect, remain; UINT rcnt; BYTE cs, *rbuff = buff; FATFS *fs = FatFs; *br = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) return FR_NOT_OPENED; /* Check if opened */ remain = fs->fsize - fs->fptr; if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ while (btr) { /* Repeat until all data transferred */ if ((fs->fptr % 512) == 0) { /* On the sector boundary? */ cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */ if (!cs) { /* On the cluster boundary? */ if (fs->fptr == 0) { /* On the top of the file? */ clst = fs->org_clust; } else { clst = get_fat(fs->curr_clust); } if (clst <= 1) ABORT(FR_DISK_ERR); fs->curr_clust = clst; /* Update current cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + cs; } rcnt = 512 - (UINT)fs->fptr % 512; /* Get partial sector data from sector buffer */ if (rcnt > btr) rcnt = btr; dr = disk_readp(rbuff, fs->dsect, (UINT)fs->fptr % 512, rcnt); if (dr) ABORT(FR_DISK_ERR); fs->fptr += rcnt; /* Advances file read pointer */ btr -= rcnt; *br += rcnt; /* Update read counter */ if (rbuff) rbuff += rcnt; /* Advances the data pointer if destination is memory */ } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Write File */ /*-----------------------------------------------------------------------*/ #if PF_USE_WRITE FRESULT pf_write ( const void* buff, /* Pointer to the data to be written */ UINT btw, /* Number of bytes to write (0:Finalize the current write operation) */ UINT* bw /* Pointer to number of bytes written */ ) { CLUST clst; DWORD sect, remain; const BYTE *p = buff; BYTE cs; UINT wcnt; FATFS *fs = FatFs; *bw = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) return FR_NOT_OPENED; /* Check if opened */ if (!btw) { /* Finalize request */ if ((fs->flag & FA__WIP) && disk_writep(0, 0)) ABORT(FR_DISK_ERR); fs->flag &= ~FA__WIP; return FR_OK; } else { /* Write data request */ if (!(fs->flag & FA__WIP)) { /* Round-down fptr to the sector boundary */ fs->fptr &= 0xFFFFFE00; } } remain = fs->fsize - fs->fptr; if (btw > remain) btw = (UINT)remain; /* Truncate btw by remaining bytes */ while (btw) { /* Repeat until all data transferred */ if ((UINT)fs->fptr % 512 == 0) { /* On the sector boundary? */ cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */ if (!cs) { /* On the cluster boundary? */ if (fs->fptr == 0) { /* On the top of the file? */ clst = fs->org_clust; } else { clst = get_fat(fs->curr_clust); } if (clst <= 1) ABORT(FR_DISK_ERR); fs->curr_clust = clst; /* Update current cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + cs; if (disk_writep(0, fs->dsect)) ABORT(FR_DISK_ERR); /* Initiate a sector write operation */ fs->flag |= FA__WIP; } wcnt = 512 - (UINT)fs->fptr % 512; /* Number of bytes to write to the sector */ if (wcnt > btw) wcnt = btw; if (disk_writep(p, wcnt)) ABORT(FR_DISK_ERR); /* Send data to the sector */ fs->fptr += wcnt; p += wcnt; /* Update pointers and counters */ btw -= wcnt; *bw += wcnt; if ((UINT)fs->fptr % 512 == 0) { if (disk_writep(0, 0)) ABORT(FR_DISK_ERR); /* Finalize the currtent secter write operation */ fs->flag &= ~FA__WIP; } } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Seek File R/W Pointer */ /*-----------------------------------------------------------------------*/ #if PF_USE_LSEEK FRESULT pf_lseek ( DWORD ofs /* File pointer from top of file */ ) { CLUST clst; DWORD bcs, sect, ifptr; FATFS *fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) return FR_NOT_OPENED; /* Check if opened */ if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */ ifptr = fs->fptr; fs->fptr = 0; if (ofs > 0) { bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */ if (ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ ofs -= fs->fptr; clst = fs->curr_clust; } else { /* When seek to back cluster, */ clst = fs->org_clust; /* start from the first cluster */ fs->curr_clust = clst; } while (ofs > bcs) { /* Cluster following loop */ clst = get_fat(clst); /* Follow cluster chain */ if (clst <= 1 || clst >= fs->n_fatent) ABORT(FR_DISK_ERR); fs->curr_clust = clst; fs->fptr += bcs; ofs -= bcs; } fs->fptr += ofs; sect = clust2sect(clst); /* Current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + (fs->fptr / 512 & (fs->csize - 1)); } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Create a Directroy Object */ /*-----------------------------------------------------------------------*/ #if PF_USE_DIR FRESULT pf_opendir ( DIR *dj, /* Pointer to directory object to create */ const char *path /* Pointer to the directory path */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { dj->fn = sp; res = follow_path(dj, dir, path); /* Follow the path to the directory */ if (res == FR_OK) { /* Follow completed */ if (dir[0]) { /* It is not the root dir */ if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ dj->sclust = get_clust(dir); } else { /* The object is not a directory */ res = FR_NO_FILE; } } if (res == FR_OK) { res = dir_rewind(dj); /* Rewind dir */ } } } return res; } /*-----------------------------------------------------------------------*/ /* Read Directory Entry in Sequense */ /*-----------------------------------------------------------------------*/ FRESULT pf_readdir ( DIR *dj, /* Pointer to the open directory object */ FILINFO *fno /* Pointer to file information to return */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS *fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { dj->fn = sp; if (!fno) { res = dir_rewind(dj); } else { res = dir_read(dj, dir); /* Get current directory item */ if (res == FR_NO_FILE) res = FR_OK; if (res == FR_OK) { /* A valid entry is found */ get_fileinfo(dj, dir, fno); /* Get the object information */ res = dir_next(dj); /* Increment read index for next */ if (res == FR_NO_FILE) res = FR_OK; } } } return res; } #endif /* PF_USE_DIR */